Surf-mattress



H. B. MARSHALL.

SURF MATTRESS.

APPLICATION FILED AUG-9, I919.

1,332,673. Patented Mar. 2, 1920.

IIIIIII [n 957L7 7? 1Z5. [7472570422,

HARRY B. MARSHALL, OF LONG BEACH, CALIFORNIA.

SURF-MATTRESS.

Specification of Letters Patent.

Patented Mar. 2, 1920.

Application filed August 9, 1919. Serial a... 318,464.

To all whom it may concern:

Be it known that I, HARRY B. MARSHALL, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and State of California, have invented new and useful Improvements in Surf-Mattresses, of which the following is a specification.

My object is to make a pneumatic surf mattress, and my invention consists of the novel features herein shown, described and claimed.

My present invention is an improvement upon the invention shown and described in my patent for surf mattresses, dated June 24, 1919, Patent No. 1,307,825.

Figure 1 is a perspective of a pneumatic surf mattress embodying the principles of my invention, parts being broken away and showing the operation of inserting the inner tubes.

Fig. 2 is an enlarged fragmentary, cross sectional detail on the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary cross sectional detail on the line 33 of Fig. 1.

A piece of suitable canvas is cut to the desired size and shape to make the bottom 1, and a similar piece of canvas is cut to the desired size and shape to make the top 2. The edge 3 of the bottom 1 is folded inwardly upon itself along the two long sides and the foot end, and the edge 4 of the top 2 is like wise folded inwardly upon itself. A reinforcing strip 5 is folded upon itself and placed between the edges 3 and e, and

stitching 6 is applied through the top and.

bottom and through the reinforcing strip.

Vertical longitudinally extending partitions 7 are placed between the bottom 1 and top 2. Reinforcin strips 8 and 9 are placed against the outer faces of the bottom 1 and top 2 and stitching 10 and 11 is inserted through the reinforcing strips 8 and 9 through the top and bottom and through the edges of the partitions 7.

The casing thus constructed is open at the head end, and the inner tube chambers 11 are open at their head ends for the insertion of the inner tubes 12.

The bottom 1 is somewhat longer than the top 2 and has a flap portion 13 extending around the head end outside of the flap portion 14 extending from the top 2. A third piece of canvas is folded upon itself to form the double thickness flap 15 and the edges of the canvas are secured to the bottom 1 by stitching 16, said stitching 16 being in the horizontal plane of the stitching 6 and forming a continuation of the stitching 6 around the head end of the mattress.

A rope 17 is placed against the seam formed by the stitching 6 and the rope is secured in place by threads 18 passing around the rope and through the seam. The threads 18 are spaced apart all the way around the mattress leaving the rope free between the threads to form handholds for gripping the mattress.

Openings 19 are formed through the flap 1 1 some distance from its free edge and in a transverse row. The flaps 13 and 1 1 are separated and the inner tubes 12 are inserted into the chambers 11.

The inner tubes 12 are round soft rubber bladders, and the ends of the bladders are closed by flattening and cementing, and the tubes are inserted into the chambers 11 by bending one flattened end B around the end of the stick A and pushing the stick and tube into the chamber, as shown in Fig. 1.

The inner tubes 12 have air inlet valves 20 and the valves are located uniformly at corresponding ends of the tubes so as to come at the open end of the casing with the valves 20 in the openings 19 and with the flap 14 fitting inside of the flap 13.

A fourth piece of canvas is secured to the top 2 at the opposite side of the openings 19 from the free edge of the flap 14: by stitching 21 thus producing the flap 22, and the flap 22 is secured to the flap 13 by lacing 23. The lacing 23 goes across the openings 19, so that the air valves 20 are accessible through the lacing for inflating the inner tubes 12. The flap 15 covers the lacing 23.

-A fifth piece of canvas is folded upon itself and connected to the top 2 by stitching 24 beyond the stitching 21 from the openings 19 thus producing the flap 25, and lacing 26 connects the flap 25 to the flap 15.

The double thickness flap 15 covering the lacing 23 serves to exclude water from the inner tube chambers 11.

The pneumatic surf mattress thus produced is flat and rectan ular in plan. It is soft, flexible, light buoyant, it will easily carry a considerable weight, it is not likely to injure any one by collision and it is easily made and easily repaired.

Various changes may be made without departing from the spirit of my invention as claimed.

I claim:

1. A pneumatic surf mattress including a canvas casing composed of a top member and a bottom member; longitudinal canvas partitions within the casing; reinforcing strips on the outside of said top member and on the outside of said bottom member, the upper and lower edges of said partitions being sewed respectively to said upper and lower casing members and the reinforcing strips thereon; pneumatic tubes in the casing between said partitions, the side edges and one end edge of the top and bottom casing members being folded upon themselves; a strip of longitudinally folded canvas inserted between the folded edges of said top and bottom casing members and said edges and folded strip being sewed together; a rope fixed at intervals to the casin along its side and end seam forming suitfble handhold loops; and means for closing the other end of the casing.

2. A pneumatic surf mattress including a canvas casing composed of a top and a bot tom member, theside and end edges of said members being stitched together in a suitable seam; longitudinal partitions in said casingstitched to the top and bottom members thereof; pneumatic tubes in said casing between said partitions; valves in the upper wall of said tube at the end thereof corresponding to the other end of the casing,

said valves being in alinement transversely of the casing; a flap on the other end of said bottom member extending up and around said end to a point :adjacent to said valves; a flap on the other end of said top member extending over said valves and under the flap of said bottom member; a piece of canvas sewed to the edge of the flap of said bottom member :and extending over said valves and sewed 't0 the :top member of said casing; :a'second piece of canvas folded upon itself and sewed at one end to the outside of the flap of said bottom member midway between the top and bottom of the casing and extending :in'W-ardly over said valves; a third piece of canvas folded upon itself and sewed at one edge to the upper member of the casing inwardly beyond'the inner sewed edge of said first piece; and a lacing for lacing the adjacent edges of said second and said third pieces of canvas. In testimony wh ereof I have name to this specification.

HARRY B. MARSHALL.

signed my 

